1. The grade of bean paste can be distinguished according to the fermentation time, and the fermentation time of super bean paste is the longest, usually 3 years. The fermentation time of first-class bean paste is more than one year, the fermentation time of second-class bean paste is 6 months, and the fermentation time of red oil bean paste is 3-6 months.
2. In addition to the fermentation time, you can also look at the color of the bean paste. The super-grade bean paste is bright red and oily, has a mellow taste and basically contains no water. In contrast, the second-grade bean paste and red oil bean paste contain a little more water, and the taste is relatively reduced.
3. Bean paste is the same as wine. The bean paste fermented for a long time is rich in flavor, and the spicy taste is soft and not irritating. Even if you break the steamed bread in half and eat it in the middle, you will feel that the sauce is full of flavor.